[Edaily Reporter Kim Hyun-ah ] SKTelecom(017670)has ranked first for the 27th consecutive year in the mobile communications category of the Korea Service Quality Index (KS-SQI), the country’s leading service quality evaluation, extending its record as the longest-running leader across all industries.

SKTelecom announced on the 2nd that it had taken first place in the mobile communications category of the “2026 Korea Service Quality Index (KS-SQI)” survey released by the Korean Standards Association.

This marks the 27th consecutive year at the top since the KS-SQI was first conducted in 2000; SKTelecom is the only company across all industries to have held the No. 1 spot in the same category for 27 consecutive years. The company has also maintained its leading position in Korea’s major customer satisfaction evaluations, including the National Customer Satisfaction Index (NCSI), where it has ranked first for 28 consecutive years.

SK’s ICT affiliates also swept the top spots across all categories. SK Broadband ranked first for 12 consecutive years in the high-speed internet category and for 8 consecutive years in the IPTV category, while SK Telink ranked first for 18 consecutive years in the international calling category and for 4 consecutive years in the mobile virtual network operator (MVNO) category.

KS-SQI is Korea’s leading customer satisfaction index, administered by the Korean Standards Association, which evaluates the service quality as perceived by customers based on eight criteria, including expertise, reliability, proactiveness, and social value.

SKTelecom explained that in this evaluation, its efforts to improve services through customer experience (CX) innovation and to restore customer trust were highly praised.

Following a cyber breach last year, the company comprehensively improved its customer-facing services and expanded tailored programs for long-term customers and those in their 20s to 40s. It also improved its customer response system by directly listening to the feedback of customers who have been with the company for over 40 years, streamlining customer service procedures, and assigning dedicated customer service representatives.

Furthermore, it established a system to incorporate customer feedback into its services and policies by operating a Customer Trust Committee and a Customer Advisory Panel.

The company is also accelerating efforts to strengthen the competitiveness of its products. It has simplified complex rate plan structures and introduced a benefit that continues to provide a basic data allowance even after all allocated data has been used. During the summer vacation season, it has expanded roaming data allowances and is currently running a “70% Off First Roaming” promotion for customers in their 20s and 30s.

Membership benefits have also been enhanced. Through T Membership, the company operates “Young Week” for customers aged 13–34 and “T Long-Term Customer Day” for subscribers who have been with the company for 10 years or more, expanding tangible benefits for customers in areas such as performances, dining, and cultural content.

The company has also received high praise for creating social value and strengthening security through AI technology. SKTelecom supports welfare checks and emergency rescue for vulnerable groups through its AI care services and provides care services for people with developmental disabilities using vision AI technology.

In addition, by advancing its AI-based spam and voice phishing blocking systems and network security technologies, the company blocked approximately 186 million instances of spam and voice phishing in the first quarter of this year. Recently, it published its first “Information Security White Paper 2025,” detailing its information security initiatives, and has begun efforts to further enhance its information security framework.

Jeong Jae-heon, CEO of SKTelecom, stated, “Ranking first in the KS-SQI for 27 consecutive years was made possible by our customers’ unwavering trust,” adding, “We will continue customer-centric innovation to provide services that customers can use with peace of mind and to establish ourselves as a trusted telecommunications company.”